1212921296 has 40 divisors (see below), whose sum is σ = 2410188000. Its totient is φ = 591002496.

The previous prime is 1212921289. The next prime is 1212921299. The reversal of 1212921296 is 6921292121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212921299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341546 + ... + 345078.

It is an arithmetic number, because the mean of its divisors is an integer number (60254700).

Almost surely, 2^1212921296 is an apocalyptic number.

1212921296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1212921296 is a deficient number, since it is larger than the sum of its proper divisors (1197266704).

1212921296 is a wasteful number, since it uses less digits than its factorization.

1212921296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083 (or 4077 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 1212921296 is about 34827.0196255723. The cubic root of 1212921296 is about 1066.4591066626.

The spelling of 1212921296 in words is "one billion, two hundred twelve million, nine hundred twenty-one thousand, two hundred ninety-six".